KIEV, UKRAINE - FEBRUARY 19: Berkut riot police shoot rubber bullets toward anti-government protesters on Independence Square on February 19, 2014 in Kiev, Ukraine. After several weeks of calm, violence has again flared between anti-government protesters and police as the Ukrainian parliament is meant to take up the question of whether to revert to the country's 2004 constitution. (Photo by Brendan Hoffman/Getty Images) *** Local Caption ***